CS 3430 Lecture Notes - Lecture 4: Physical Data Model, Database Schema, Nosql

• School: App State
• Department: Computer Science
• Course: CS 3430
• Professor: Mohammad Mohebbi

Document Summary

Based on the level of abstraction: high-level or conceptual data models low-level or physical data models. They represent things, objects or mini-world with concepts that many people could understand, such as table or entity, column or attribute, and also with relationships (relation of two objects/table). Examples: er model (chapter 3), self-describing data models (it is different than self-describing characteristic of databases): self-describing data models store each data item with its description, as key-value pairs, example: xml or nosql, xml example: (extensible markup language)